Improvement in mills for crushing quartz



2 Sheets-Sheet 1.

J. W. GOGHRAN. MILL FOR QRUSHING QUARTZ.

No. 9,013. Patented June 15, 1852.

2 Sheets--Sheet 2.

J. W. GOOHRAN;

MILL FOR ORUSHING QUARTZ.

No. 9,013. Patented June 15, 1852.

NITED STATES JOHN W. GOCHRAN, OF NEW YOR.K, N. Y.

IMPROVEMENT I'N MILLS FOR CRUSHlNG-QUARTZ.

Specification forming part of Letters Patent No. 9,0l-B, dated June 15. 18372.

To all whom it may concernf Be it known that I, JOHN \VEBsEER COoH- BAN, of the city, county; and State of -New York, have invented certain new and useful improvements in machines for crushing and grinding quartz, rocks, and stones, and other substances requiring to be crushed and ground, and for amalgamating and separating gold and other metallic substances therefrom; and I do hereby declare that the following is a full and enact description thereof.

In constructing my machines I employ it statlonary foundation plate or disk flanged or curbed on its periphery, with a groove or" grooves at suitable distances from the outside flange, encircling the plate the same as the In these grooves I place a given by a second plate or disk, which is made to revolve, its weight being supported by the balls. The upper surface of the revolving plate or disk is made with inclined planes, upon which I place another set of balls or weights, which are so held by stationary fixtures that they cannot revolve with the iiiclined planes; but as the plate and planes revolve the balls roll up the planes, from which they fall by their own gravity, asthe planes move under them, to the base of the planes.

At the place where the balls strike, the plate is perforated.

The machine being ready for operation and power being communicated to the upper or revolving plate or disk, the quartz or other material is placed upon the upper surface between the inclined planes. As the plate and planes revolve, the weights rise and fall upon the material, crushing it to a suitable fineness to pass through the perforations in the revolving plate. The material then in its crushed or broken state is further ground and pulverized by the balls between the two plates. The motion of the balls between the stationary and revolving plates or disks may be compared to a planetary or planispherical motion, as by the weight and motion of the revolving plate they are made to revolve upon their own centers, and at the same time to revolve around the plate in the grooves in which they are placed, their action being at the same time both a rolling and grinding motion. I find it desirable to have each alternate ball of a smaller size, and not moved d-ir. clly by the revolving plate above, but moved by the larger halls in the samcd'irection with them, while on their own centers they revolve in'a contrary direct ion. 'lliose smaller balls thus prevent any tendency to bind in the movements of the machine.

If it. is required to amalgamate and separate gold or other metallic substances from the material ground, l place quicksilver with the balls in the grooves in the stationary plate nearest. the center, when,as the balls revolve, the gold and quicksilver are amalgamated, while the earthy matter is floated by the current of water in which the quartz is generally ground. It the amalgamation is to be performed at the same time with the process of grinding, the revolving plate which moves the ainalgainating-balls maybe a separate plate from that which carries the grindingballs, but both plates may be connected so that they may revolve together; but the whole series of balls may be used either for grinding or ainalgamating, separately or in combination. v

The revolving plates are iitted onto the shaft or spindle around which they revolve in a loose manner in order that the plates "may rise and fall to accommodate themselves to hard particles which the balls may pass over without readily crushing. The revolving plate is formed-in such a manne that itinay receive any additional weight required to give greater grinding effectto the balls on which the plate rests.

The capacity of this machine for grinding is in proportion to the weight of the revolving plate; but the power required to operate it does not increase with the additional weight. When the weight is doubled, the extra power required is scarcely perceptible.

The machines inaybe nade of any required size and material. If for grinding quartz, they may be made wholly'of cast-iron. If for artists colors, they may be made of glass or porcelain, or other incorrosive material.

In the accompanying drawings, Figure 1. represents a top plan view of the machine; Fig. 2, a vertical cross-sectionthereof. Fig 3 shows a plan view of Fig. t with all above the red lines removed, and Fig. 4 a side ele ing plate in position.

a a a aare the balls to be put in motion by the Weight and movement of-the revolving plate B.

d and cl are the grooves in the foundationplate in which the balls revolve, each alternate ball being of smaller size.

b'are perforations or holes in the revolving.

plate, through which the crushed materialpasses to the grinding-balls a a. 1

cl are ports for discharging water and earthy matter floated off by the current passing through the machine when in operation.

0, Fig. 2, shows an inner plate for moving the balls in Ll when the machine is used with quicksilver as an amalgamator.

Having described the manner :in which I )DStI'llCt my machines, what'I claim as my ven tion, and desire to secure by Letters Pat- .t, is

Giving motion to the balls between the two ates or disks, in the manner and for the lrpose substantially as above specified.

J. W. COCHRAN Witnesses:

MILES B. ANDRUs, HENRY O. PARK-HURSI. 

